MARC 21 Format for Authority Data: 083: Dewey Decimal Classification Number (Network Development and MARC Standards Office, Library of Congress)

Single Dewey classification number or a a number span associated with a 1XX heading in an established heading record or a subdivision record. Source of the classification number is the Dewey Decimal Classification and Relative Index; the Abridged Dewey Decimal Classification and Relative Index; and electronic updates to either edition. Through 1997, updates were issued in the DC& Dewey Decimal Classification Additions, Notes and Decisions.

Classification number(s) may be qualified by a descriptive term when the heading is represented in more than one place in the Dewey classification schedules. In a subdivision record, the field also contains the number of the table from which the classification number is taken. Each classification number or number span associated with a heading is contained in a separate 083 field. The second indicator values distinguish between content actually assigned by the Library of Congress and content assigned by an organization other than LC. The organization is identified in subfield $5.

GUIDELINES FOR APPLYING CONTENT DESIGNATORS

■ INDICATORS

First Indicator - Type of edition

Whether the class number is from the full or the abridged edition of the classification schedules. The actual edition number is contained in subfield $2.

0 - Full

Class number is from the full edition.


150	##$aAviation medicine
083	00$a616.980213$222

1 - Abridged

Class number is from the abridged edition.


150	##$aAviation medicine
083	10$a616.9$213

Second Indicator - Source of classification number

Whether the source of the classification number is the Library of Congress or another organization.

0 - Assigned by LC

4 - Assigned by agency other than LC

MARC code for the organization is contained in subfield $5.


150	##$aTransliteration
083	04$a411$222$5[organization code]

■ SUBFIELD CODES

$a - Classification number element-single number or beginning number of span

Single class number or the first number in a number span.


130	#0$aBible.$lEnglish.$sAuthorized
083	00$a220.5203$222


151	##$aChina
083	10$a951$213


181	##$zChina
083	00$z2$a51$222

$b - Classification number element-ending number of span

Ending number of a number span when the beginning number of the span is contained in subfield $a.


150	##$aWorld War, 1939-1945$vPersonal narratives
083	00$a940.5481$b940.5482$220

$c - Explanatory term

Descriptive term or phrase that specifies the topic of the class number. Normally used to differentiate between two or more class numbers associated with the heading. Parentheses that enclose the phrase or term may be generated for display.


150	##$aGold
083	00$a669.22$cInterdisciplinary$222
083	00$a549.23$cMineralogy$222
083	00$a553.41$cEconomic geology$222

$y - Table sequence number for internal subarrangement or add table

Sequence number or other identifier for an internal classification subarrangement or add table. If the first or only add table found at a classification number is the number 1, succeeding integers are used for any following add tables found at that number.

$z - Table identification-table number

Number of the table from which the classification number in a subdivision record is taken. Subfield $z always precedes the associated subfield $a in the field.


180	##$xData processing
083	00$z1$a0285$222


185	##$vDictionaries
083	00$z1$a03$cSubject dictionaries$222
083	00$z4$a3$cLanguage dictionaries$222

$2 - Edition number

If numbers are assigned from more than one edition, each number or number span is contained in a separate 083 field.


100	1#$aSartre, Jean Paul,$d1905-
083	00$a194$cInterdisciplinary$222
083	00$a848.91409$222

INPUT CONVENTIONS

Display Constants

-	[hyphen associated with the content of subfields $a and $b]
( ... )	[parentheses associated with the content of subfield $c]
T	[abbreviation associated with the content of subfield $z]
-	[dash associated with the content of subfields $z and $a]
dc	[abbreviation associated with the content of subfield $2]

Hyphen between the two class numbers in a number span in subfields $a and $b; the parentheses that may enclose an explanatory term in subfield $c in an established heading record; the abbreviation T before the table number in subfield $z; the dash between the table number and the class number in subfields $z and $a; and the abbreviation dc before the edition number in subfield $2 are not carried in the MARC record. They may be system generated as display constants associated with the content of subfields $a, $b, $c, $z, and $2, respectively.


	Content designated field:
083	00$a346.3$b346.9$cSpecific jurisdictions and areas$222346.3-346.9 (Specific jurisdictions and areas) dc22


	Content designated field:
083	00$z4$a5$222T4-5 dc22

CONTENT DESIGNATOR HISTORY

Indicator 1 - Type of edition [CAN/MARC only]
# - No edition information recorded [OBSOLETE, 1997]
2 - Abridged NST version [OBSOLETE, 1997]
Indicator 2 - Source of Classification Number [NEW, 1995]
Prior to 1995, field 083 was an agency-assigned field and contained only classifications numbers assigned by the Library of Congress.

$y - Table sequence number for internal subarrangement or add table [NEW, 2008]

083 - Dewey Decimal Classification Number (R)

FIELD DEFINITION AND SCOPE

GUIDELINES FOR APPLYING CONTENT DESIGNATORS

■ INDICATORS

■ SUBFIELD CODES

INPUT CONVENTIONS

CONTENT DESIGNATOR HISTORY


Subfield Codes
$a - Classification number element-single number or beginning number of span (NR) $b - Classification number element-ending number of span (NR) $c - Explanatory term (NR) $y - Table sequence number for internal subarrangement or add table (R)	$z - Table identification-table number (NR) $2 - Edition number (NR) $5 - Institution to which field applies (R) $6 - Linkage (NR) $8 - Field link and sequence number (R)